body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 600px;
  margin: 50px auto;
  padding: 20px;
  background: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
}

h1 {
  text-align: center;
  color: #333;
}

.tabs {
  display: flex;
  justify-content: space-around;
  margin-bottom: 20px;
}

.tab-link {
  padding: 10px 20px;
  background: #f1f1f1;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.3s;
}

.tab-link.active {
  background: #850000;
  color: #fff;
}

.tab-link:hover {
  background: #85554D;
  color: #fff;
}

.tab-content {
  display: none;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 5px;
}

.tab-content.active {
  display: block;
}

.qr-code {
  display: block;
  max-width: 320px;
  margin: 20px auto;
}

ul {
  list-style-type: none;
  padding: 0;
}

ul li {
  margin: 10px 0;
}